GB1267625A - A multiplexer - Google Patents

A multiplexer

Info

Publication number
GB1267625A
GB1267625A GB08878/70A GB1887870A GB1267625A GB 1267625 A GB1267625 A GB 1267625A GB 08878/70 A GB08878/70 A GB 08878/70A GB 1887870 A GB1887870 A GB 1887870A GB 1267625 A GB1267625 A GB 1267625A
Authority
GB
United Kingdom
Prior art keywords
output
time
slot
line
gates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB08878/70A
Inventor
Felix Hugo Closs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1267625A publication Critical patent/GB1267625A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2365—Multiplexing of several video streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • H04J3/1688—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers the demands of the users being taken into account after redundancy removal, e.g. by predictive coding, by variable sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4347—Demultiplexing of several video streams

Abstract

1,267,625. Multiplex pulse-code signalling. INTERNATIONAL BUSINESS MACHINES CORP. 21 April, 1970 [14 May, 1969], No. 18878/70. Heading H4L. A time-division multiplexing arrangement includes a selector switch receiving signals on a number of lines and providing at each slot time a signal on one line only of a corresponding number of output lines, the line selected by the switch being a pseudo-random choice from among those corresponding to " busy " input lines. As shown, inputs 1-4 if busy set flipflops 32-1 to 32-4 at the beginning of each slot period and switch 10 selects one output line 35-1 to 35-4 to gate the information pulse train through one of the gates 34 to the output 12. The end of each time slot is reserved for the coded address of the input line, and this is generated at 11 and inserted after the information bits. Selection of one output when more than one input is receiving data is effected in pseudo-random manner under control of a gated recirculating shift register 13 clocked at the time-slot rate and controlling n stages of gates in 10 (where unit 10 has 2<SP>n</SP> inputs); the arrangement of gates is illustrated in Fig. 2a (not shown). The invention is described in relation to black-and-white picture transmission (e.g. in a system as described in Specification 1,256,631) where grey levels are digitized, possibly using a run-length coding method.
GB08878/70A 1969-05-14 1970-04-21 A multiplexer Expired GB1267625A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH744569A CH488345A (en) 1969-05-14 1969-05-14 Multiplex facility

Publications (1)

Publication Number Publication Date
GB1267625A true GB1267625A (en) 1972-03-22

Family

ID=4325233

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08878/70A Expired GB1267625A (en) 1969-05-14 1970-04-21 A multiplexer

Country Status (7)

Country Link
US (1) US3647977A (en)
JP (1) JPS527289B1 (en)
CA (1) CA947887A (en)
CH (1) CH488345A (en)
FR (1) FR2046208A5 (en)
GB (1) GB1267625A (en)
SE (1) SE356864B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5325202B2 (en) * 1972-08-29 1978-07-25
DE2351013B2 (en) * 1973-10-11 1977-08-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt MESSAGE TRANSMISSION SYSTEM
FR2408951A1 (en) * 1977-11-09 1979-06-08 Aerospatiale DEVICE FOR THE TRANSMISSION OF STOCHASTIC INFORMATION
US5600573A (en) * 1992-12-09 1997-02-04 Discovery Communications, Inc. Operations center with video storage for a television program packaging and delivery system
CA2444170C (en) 1992-12-09 2009-09-22 Discovery Communications, Inc. Reprogrammable terminal for suggesting programs offered on a television program delivery system
US8621289B2 (en) 2010-07-14 2013-12-31 Lsi Corporation Local and global interleaving/de-interleaving on values in an information word
US8976876B2 (en) 2010-10-25 2015-03-10 Lsi Corporation Communications system supporting multiple sector sizes
US8782320B2 (en) * 2010-11-09 2014-07-15 Lsi Corporation Multi-stage interconnection networks having fixed mappings
US8588223B2 (en) 2010-11-09 2013-11-19 Lsi Corporation Multi-stage interconnection networks having smaller memory requirements

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719188A (en) * 1950-05-05 1955-09-27 Bell Telephone Labor Inc Non-synchronous time division multiplex telephone transmission
US2935627A (en) * 1958-08-20 1960-05-03 Gen Dynamics Corp Priority demand circuits
DE1221267B (en) * 1960-03-07 1966-07-21 Philips Nv Circuit arrangement for the preferential sending of messages of different urgency in telecommunication systems, in particular teleprinter systems
US3312783A (en) * 1964-08-07 1967-04-04 Stromberg Carlson Corp Signal amplitude sequenced time division multiplex communication system
GB1102020A (en) * 1965-08-26 1968-02-07 Peter Heaton Improvements relating to digital telephone systems
US3485953A (en) * 1966-12-06 1969-12-23 Control Data Corp Asynchronous time-sharing of multi-carrier channels
US3516089A (en) * 1967-05-10 1970-06-02 Ind Instrumentations Inc Shift register controlled scanning function monitor

Also Published As

Publication number Publication date
FR2046208A5 (en) 1971-03-05
US3647977A (en) 1972-03-07
SE356864B (en) 1973-06-04
JPS527289B1 (en) 1977-03-01
CA947887A (en) 1974-05-21
DE2021510B2 (en) 1972-06-22
CH488345A (en) 1970-03-31
DE2021510A1 (en) 1970-11-19

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